Shaft-coupling.



' W. l. FRANCKE..

SHAFT COUPLING; APPLICATION man JAN. 1o. |911.

l,26322@. Patented Apr.16,1'91&

/WEf/ron Hman/6% fd /ff mf Afro/mers L UNITED safrEs ,PATENT onnil. y'

co., oF NEW BRUNSWIC1I,'NEW JERSEY,- .a boRPoRATIoN'oE'NEW JERSEY.

l sIIAET-coIrLING.

To all .whom it 'may concern.' I

Be it known that I, WILLIAM J. FRANCKE,

`a citizen ofthe United States, and a resident l of Highland `Park, in the county of Middle- -A a sleeve is used, made in sections, and adapted to fit onto the ends of the shafts to/be` coupled, the sleeve taperin from the middle middle tothe ends. rlhe tapering portions sex and State of New Jersey, have Iinvented a new and Improved Shaft-Coupling, of which the following is al full, clear, and exact description. l j

The object of the vinvention is to providea new and improved shaft coupling, whichv is simple and durable in construction, cheap to manufacture, and arrangedto permitfof I.

quicklyand conveniently coupling the. adjacentl ends of alined shafts together.-

In order to accomplish the desired result to the ends and the tapere portions having threads,V of which the innermost gradually diminishes in depth, and nuts screwing on the said threaded sleeve portions andhaving Haring entrance ends, screwing onto the reduced threads.

A practical embodiment .of the inventionv is represented in the accompanying drawings forming a partof this specification, in which similar characters of reference indicate corresponding partsin all the views.

Figure 1 is a side elevation of the shaft coupling with parts shown in section;

lFi .i 2 is a cross section 'of the same on the llne 2-2Lof Fig.-1;.

Fi 3 is an inverted plan view of one of the .s eeve sections; and

Fig. 4 is an enlarged sectional side eleva,-

tion of a portion of the sleeve member and its nut screwing thereon. l

-Onto the adjacent ends of the shafts '10' and 11 to be coupled together ts asleeve made in two longitudinal sections 12 and 13 and Itapering in opposite directions from the of the sleeve are provided externally with screw threads 14 and15 on which screw nuts 16 and 17 to clampthe sleeve'sections 1 2 and 13 firmly in place on Vthe shafts 10 and 11, thus coupling theshafts together. 'The screw threads 14. and 15l are standard threads and are cut by the usual single piece die such as its used for threading pipes, and

Specification of Letters Iatent.

Application medianuay 10,1917. seriaiNo. 141,575. 1

Patented Apr. ira-1918.

as this die is madel to Briggs standard and 1 is thereforechamfered'at itsv entrance end vit is evident that the innermost threads 18 i 'gradually diminish in depth, asv plainly illustrated in F ig. 4. Each of the nuts '16j and4 1'( is provided with a chamfered or flaring entrance and havingfits thread 19 reduced in depth and litting the threads 18 so that the entire length of each nut 16 and 17 is in engagement with the corresponding threaded portions 14 and '15. -It is .under stood that -on screwing up thenuts 16 and "17 on the tapering threaded portions 14 and 15 of the sleeve, the sections thereol are 'pressed' in firm. contact with the ends of the shafts 10 and 11 to couple the latter together.A The sleeve is preferably keyed to they shafts 410 and 11,. and for this purpose the shafts 10 and 11 are provided with keys 20 and 21, of which the key 20 projects into a slot 22 formed in the sleeve section 13, and the key 21 extends into'a slot 23 formedin the sleeve section l2; iThe slots 22 and /23 -I are Iso arranged that when the nuts 16 and 17 are screwed up then the cover vthe slots,

and the keys 20 and 21 project into the slts. Thel sleeve and the nuts are preferably provided with standard pipe threads such as are used in the fittings of pipe couplings and hence such pipe ittlngs modiied'as alcove described maybe advantageously used for shaft Jcouplings.

Having thus described my invention, I y

claim as new Patent 1. A shaft coupling, comprisin a sleeve lmade in longitudinal sections an yadapted t0 t on tothe adjacent ends of the shafts to be coupled, the sleeve having exteriortapered and threaded portions extending from the middleto the ends and each section being provided with a slot, a key carried by eac'u shaft end andprojecting into. a slot of a sleeve section, and nuts screwing on the tapered threaded portions of the sleeve, the nuts Vcovering thes'lots of the sleeve sections and the keys therein.

and desire to-secure by Letters- 2. A shaft coupling, comprising 'a sleeve portions extending from ends and the lthe' middle to the said tapered portions being provided With screw threads, the inner depth toward sleeve having shaft vends and radually diminish in projecting into the said slots,

and nuts screwing on the said threaded tapered portions of the sleeve and having flaring entrance .ends screwing onto the re- 10 duced threads of the sleeve, the nuts covering the said slots and the keys therein.

vviLLiAM J, mariene. 

